halo has definitions from the field of geometry
1
[ noun ] an indication of radiant light drawn around the head of a saint

Used in print

(Irving Stone, The Agony and the Ecstasy....)

There would be no halos , no angels .

(Robert Heinlein, Stranger in a Strange Land....)

Foster shook his halo .

Otherwise , straighten your halo , square your wings , and dig_in .

Related terms

light

2
[ noun ] (geometry) a toroidal shape

Examples

"a ring of ships in the harbor" "a halo of smoke"

Related terms

toroid fairy_ring surround

3
[ noun ] a circle of light around the sun or moon
*